Light in a shop takes on a wide variety of functions: it attracts attention through the visual effect of neon signs, windows and entrance areas. It structures the sales area into functional zones, creates perception hierarchies and highlights routes. It ensures optimum product presentations and creates special effects for particular displays or decorations. Light finally also serves as a medium to express the image and values of a brand in an identifiable way within the scope of a "corporate lighting" concept. It is also used to express seasonal themes such as a change of collections in the fashion industry by producing the appropriate atmosphere.